Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

A restaurant and observation deck built in a unique broadcasting antenna.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

Stockholm's tiniest statue is of a small boy looking at the Moon.

Sweden's oldest animated sign is still lighting up the skyline today.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A man has revenged his true love's betrayal through tears and stone genitalia.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Sweden's "good old days" painstakingly re-created in a model village.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A Roman spa buried deep beneath the City of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Scattered throughout London are ancient remnants of the city's former bounding wall.